It seems like the biggest discrete supercell tornado threat this afternoon will be initially near I-35 from central TX northward into Oklahoma. We may get a cell or two a bit further east in TX but it's much more conditional.
More concerning is the latest HRRR which show a nasty QLCS moving through NE TX, while a string of cells forms ahead of the line near the TX-LA border. Those could be our dangerous nocturnal tornado producers, aside from the QLCS itself.
It wouldn't surprise me if a bunch of people start crying bust by 7-8 pm and the main show begins shortly thereafter.